Tiron, a new substance that may entirely block some of the sun's most harmful UVA rays from reaching skin cells at all, may help slow skin aging if the substance can be safely added to food and cosmetics in years to come

Tiron, a new substance that may entirely block some of the sun's most harmful UVA rays from reaching skin cells at all, may help slow skin aging if the substance can be safely added to food and cosmetics in years to come